Probability > Tree diagrams
1234Tree diagrams

Solutions to the exercises

Exercise 1
a

3 8

b

3 8

c

5 14

d

1 8

e

3 64

f

Yes, it is now 25 64

Exercise 2
a

Own answer.

b

5 18

Exercise 3
a

0.04

b

0.08

c

4 90

d

8 90

e

Own solution.

f

with replacement : 21 50 ; without replacement : 21 45

g

If you draw a red (green) marble, the probability of an green (red) marble increases slightly.

Exercise 4
a

1 54

b

1 36

c

2 27

d

5 red (not six) with 1 white marble; three draws with replacement

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